JP2019203785A - Distance measuring system - Google Patents
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- JP2019203785A JP2019203785A JP2018098808A JP2018098808A JP2019203785A JP 2019203785 A JP2019203785 A JP 2019203785A JP 2018098808 A JP2018098808 A JP 2018098808A JP 2018098808 A JP2018098808 A JP 2018098808A JP 2019203785 A JP2019203785 A JP 2019203785A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/40—Features of the power supply for the anti-theft system, e.g. anti-theft batteries, back-up power supply or means to save battery power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
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- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
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Abstract
Description
本発明は、通信機と通信対象との間で距離を測定する距離測定システムに関する。 The present invention relates to a distance measuring system that measures a distance between a communication device and a communication target.
従来、例えば車両において、ユーザーに所持される電子キーと車両に搭載される車載機との間の無線通信を通じて車両の制御を行う電子キーシステムが知られている。電子キーシステムとしては、電子キーが自動で応答して無線通信によりＩＤ照合を行うスマート照合システムが周知である。 2. Description of the Related Art Conventionally, for example, in a vehicle, an electronic key system that controls a vehicle through wireless communication between an electronic key possessed by a user and an in-vehicle device mounted on the vehicle is known. As an electronic key system, a smart verification system in which an electronic key automatically responds and performs ID verification by wireless communication is well known.
ところで、この種の電子キーシステムにおいては、正規電子キーを所持したユーザーの意志によらない所でＩＤ照合成立を謀る行為として、中継器を使った不正行為がある。中継器を使った不正行為は、例えば電子キーが車両から遠い場所に位置する場合に、複数の中継器によって車載機及び電子キーの間の通信を中継し、ＩＤ照合を不正に成立させる行為である。よって、正規電子キーを所持したユーザーが気付かないところでＩＤ照合が成立されてしまうおそれがあった。 By the way, in this kind of electronic key system, there is a fraudulent act using a repeater as an attempt to establish ID collation without depending on the will of the user who possesses the regular electronic key. A fraudulent act using a repeater is an act of relaying communication between an in-vehicle device and an electronic key by a plurality of repeaters, for example, when the electronic key is located far from the vehicle, and illegally establishing ID verification. is there. Therefore, there is a possibility that the ID collation is established where the user who has the regular electronic key does not notice.
このような中継器を使った不正行為に対して、特許文献１には、車両と電子キーとの距離を測定して不正行為を検出する技術が開示されている。この場合、車載機と電子キーとの間でＵＷＢ帯（ＵＷＢ：Ｕｌｔｒａ Ｗｉｄｅ Ｂａｎｄ）の測距信号を相互に送受信し、その測距信号を解析することにより車両と電子キーとの距離を測定する。よって、中継器が介在する場合には測距信号の到達時間が長くなり、測定された距離が閾値よりも大きくなる。そのため、不正行為を検出できる。 With respect to the fraud using such a repeater, Patent Document 1 discloses a technique for detecting the fraud by measuring the distance between the vehicle and the electronic key. In this case, a distance measurement signal in the UWB band (UWB: Ultra Wide Band) is transmitted and received between the in-vehicle device and the electronic key, and the distance between the vehicle and the electronic key is measured by analyzing the distance measurement signal. . Therefore, when the repeater is interposed, the arrival time of the distance measurement signal becomes longer, and the measured distance becomes larger than the threshold value. Therefore, cheating can be detected.
ＵＷＢ通信は比較的多くの消費電流を必要とするため、複数の車載機のいずれかで電子キーと通信完了した時点で通信を停止し、これにより、通信回数を減らしたいという要望がある。もっとも、通信回数を減らすためには、できるだけ早い段階で通信を確立させる必要があり、通信性能の向上が不可欠となる。 Since UWB communication requires a relatively large amount of current consumption, there is a desire to stop communication when communication with an electronic key is completed in any of a plurality of in-vehicle devices, thereby reducing the number of communication times. However, in order to reduce the number of times of communication, it is necessary to establish communication at the earliest possible stage, and improvement in communication performance is essential.
本発明は、このような問題点に着目してなされたものであって、その目的は、測距通信の通信性能の向上を可能にした距離測定システムを提供することにある。 The present invention has been made paying attention to such problems, and an object of the present invention is to provide a distance measurement system that can improve communication performance of distance measurement communication.
上記課題を解決する距離測定システムは、測距開始条件の成立を契機に、通信機とその通信機の通信対象との間で測距信号を相互に送受信する測距通信を行い、その測距信号を解析することにより通信機と通信対象との距離を測定する距離測定システムにおいて、前記通信機として、室外測距開始条件の成立を契機に室外測距通信を行う室外通信機と、室内測距開始条件の成立を契機に室内測距通信を行う室内通信機とを備え、通信対象との間で室外測距通信が確立した室外通信機に応じて、室内通信機の動作順を決定する通信制御部を備える。 A distance measurement system that solves the above-mentioned problems performs distance measurement communication that transmits and receives distance signals between a communication device and a communication target of the communication device when the distance measurement start condition is satisfied, and the distance measurement system In a distance measurement system that measures a distance between a communication device and a communication target by analyzing a signal, the communication device includes an outdoor communication device that performs outdoor distance measurement communication when an outdoor distance measurement start condition is satisfied, and an indoor measurement device. An indoor communication device that performs indoor ranging communication when the distance start condition is satisfied, and determines the operation order of the indoor communication device according to the outdoor communication device that has established outdoor ranging communication with the communication target A communication control unit is provided.
この構成によれば、室内通信機の動作順がいわば最適化される。したがって、室内測距通信の通信性能を向上できる。
上記距離測定システムについて、室外通信機に室内通信機の動作順が紐付けされた動作順データを記憶するメモリを備え、前記通信制御部は、通信対象との間で室外測距通信が確立した室外通信機に紐付けされた動作順にしたがって室内通信機を動作させることとしてもよい。
According to this configuration, the operation order of the indoor communication device is optimized. Therefore, the communication performance of indoor ranging communication can be improved.
The distance measurement system includes a memory for storing operation order data in which the operation order of the indoor communication device is linked to the outdoor communication device, and the communication control unit establishes outdoor distance measurement communication with a communication target. It is good also as operating an indoor communication apparatus according to the operation | movement order linked | related with the outdoor communication apparatus.
この構成によれば、動作順データを参照しつつ適切に室内通信機を選択することができる。
上記距離測定システムについて、前記通信制御部は、通信対象との間で室外測距通信が確立した室外通信機から近い順に室内通信機を動作させることとしてもよい。
According to this configuration, the indoor communication device can be appropriately selected while referring to the operation order data.
About the said distance measurement system, the said communication control part is good also as operating an indoor communication apparatus in order from the outdoor communication apparatus with which the outdoor ranging communication was established between communication objects.
この構成によれば、いわば室内測距通信が確立しやすい順に室内通信機が選択される。これにより、早期に通信成立する確率を上げることができる。
上記距離測定システムについて、前記通信制御部は、いずれかの室外通信機で通信対象と室外測距通信が完了した場合には、次の室外測距開始条件が成立するまで室外測距通信を停止するとともに、その室外測距通信が完了した室外通信機に応じて、室内通信機の動作順を決定することとしてもよい。
According to this configuration, the indoor communication devices are selected in the order in which indoor ranging communication is easily established. Thereby, the probability that communication will be established at an early stage can be increased.
In the above distance measurement system, the communication control unit stops outdoor ranging communication until the next outdoor ranging start condition is satisfied when the outdoor ranging communication with the communication target is completed in any of the outdoor communication devices. In addition, the order of operation of the indoor communication devices may be determined according to the outdoor communication device that has completed the outdoor ranging communication.
この構成によれば、室外測距通信にかかる消費電流を少なくできる他、早い段階で室内通信機の動作順を決定することができる。
上記距離測定システムについて、前記通信制御部は、いずれかの室内通信機で通信対象と室内測距通信が確立した場合には、次の室内測距開始条件が成立するまで室内測距通信を停止することとしてもよい。
According to this configuration, the current consumption for outdoor ranging communication can be reduced, and the operation order of the indoor communication devices can be determined at an early stage.
In the above distance measurement system, the communication control unit stops the indoor ranging communication until the next indoor ranging start condition is satisfied when the indoor target and the indoor ranging communication are established by any indoor communication device. It is good to do.
この構成によれば、室内測距通信にかかる消費電流を少なくできる。 According to this configuration, current consumption for indoor ranging communication can be reduced.
本発明によれば、測距通信の通信性能を向上できる。 According to the present invention, the communication performance of ranging communication can be improved.
以下、距離測定システムの一実施の形態について説明する。
図１に示すように、車両１の室外には、ＵＷＢ帯の測距信号を送受信する４つの車室外アンカー１１〜１４が設置されている。車室外アンカー１１は平面視で例えば車室外右前の隅位置に設けられ、車室外アンカー１２は平面視で例えば車室外右後の隅位置に設けられ、車室外アンカー１３は平面視で例えば車室外左前の隅位置に設けられ、車室外アンカー１４は平面視で例えば車室外左後の隅位置に設けられている。尚、車室外アンカー（１１〜１４）の個数や搭載位置はこれに限らず任意である。車室外アンカー１１〜１４はいずれも室外通信機に相当する。
Hereinafter, an embodiment of the distance measurement system will be described.
As shown in FIG. 1, four vehicle interior anchors 11 to 14 that transmit and receive a UWB range signal are installed outside the vehicle 1. The vehicle exterior anchor 11 is provided, for example, at a corner position on the right front outside the vehicle compartment in a plan view, the vehicle exterior anchor 12 is provided, for example, at a corner position on the right rear outside the vehicle compartment, and the vehicle exterior anchor 13 is, The vehicle exterior anchor 14 is provided, for example, at a corner position on the left rear outside the vehicle compartment in plan view. The number and mounting positions of the vehicle exterior anchors (11 to 14) are not limited to this and are arbitrary. The vehicle interior anchors 11 to 14 each correspond to an outdoor communication device.
一方、車両１の室内には、ＵＷＢ帯の測距信号を送受信する２つの車室内アンカー１５、１６が設置されている。車室内アンカー１５は平面視で例えばＤ席（車室内右前の運転席）のドアと右リア席のドアとの中間位置付近に設けられ、車室内アンカー１６は平面視で例えばＰ席（車室内左前の助手席）のドアと左リア席のドアとの中間位置付近に設けられている。尚、車室内アンカー（１５、１６）の個数や搭載位置はこれに限らず任意である。車室内アンカー１５、１６は共に室内通信機に相当する。 On the other hand, in the vehicle 1, two vehicle interior anchors 15 and 16 for transmitting and receiving a UWB band ranging signal are installed. The vehicle interior anchor 15 is provided, for example, in the vicinity of an intermediate position between the door of the D seat (right front driver seat) and the right rear seat door in a plan view, and the vehicle interior anchor 16 is, for example, a P seat (vehicle interior) in the plan view. It is provided near the middle position between the front left passenger door and the left rear door. The number and mounting positions of the vehicle interior anchors (15, 16) are not limited to this and are arbitrary. Both the vehicle interior anchors 15 and 16 correspond to indoor communication devices.
また、車両１には、測距信号を用いた室外測距通信（室外ＵＷＢ通信）及び室内測距通信（室内ＵＷＢ通信）を統括的に制御する車載コントローラ１０が設けられている。車載コントローラ１０は通信制御部に相当する。車載コントローラ１０は、室外測距開始条件の成立を契機に室外測距通信を開始する。室外測距開始条件成立の一例は、周知の車室外スマート通信において、車両１から定期的に発信される呼び掛け信号に対する携帯機２からの応答信号の受信時である。尚、車室外スマート通信では、呼び掛け信号による車室外通信エリアがドア単位で形成されるため、いずれのドアの周辺に形成された車室外通信エリアで車室外スマート通信が成立したのかを車載コントローラ１０によって特定できることになる。 The vehicle 1 is also provided with an in-vehicle controller 10 that comprehensively controls outdoor ranging communication (outdoor UWB communication) and indoor ranging communication (indoor UWB communication) using ranging signals. The in-vehicle controller 10 corresponds to a communication control unit. The in-vehicle controller 10 starts outdoor ranging communication when the outdoor ranging start condition is satisfied. An example of the establishment of the outdoor ranging start condition is when a response signal is received from the portable device 2 with respect to a call signal periodically transmitted from the vehicle 1 in the well-known smart communication outside the vehicle. Note that in the smart communication outside the vehicle, the communication area outside the vehicle based on the call signal is formed on a door-by-door basis. It can be specified by.
車載コントローラ１０は、室外測距開始条件が成立すると、車室外アンカー１１〜１４のうち、車室外スマート通信が成立した車室外通信エリアに対応する例えばＰ席のドアから最も近い車室外アンカー１３を最初に選択し、この車室外アンカー１３から測距信号を送信する。そして、車載コントローラ１０は、室外測距通信が完了した場合には、次の室外測距開始条件が成立するまで室外測距通信を停止する一方、車室外アンカー１３から測距信号を送信したにもかかわらず室外測距通信が確立しなかった場合には、Ｐ席のドアから車室外アンカー１３の次に近い車室外アンカー１４を選択する。以下、同様に、車載コントローラ１０は、車室外アンカー１１、車室外アンカー１２の順に動作させる。つまり、車載コントローラ１０は、車室外スマート通信を利用して、車室外アンカー１１〜１４の動作順を最適化していることになる。 When the outdoor ranging start condition is satisfied, the in-vehicle controller 10 selects the outdoor anchor 13 closest to the door of the P seat corresponding to the outdoor communication area in which the smart communication outside the vehicle is established among the outdoor anchors 11 to 14. First, the distance measurement signal is transmitted from the vehicle exterior anchor 13. When the outdoor ranging communication is completed, the in-vehicle controller 10 stops the outdoor ranging communication until the next outdoor ranging start condition is satisfied, while transmitting the ranging signal from the outdoor anchor 13. However, if the outdoor ranging communication is not established, the outdoor anchor 14 next to the outdoor anchor 13 is selected from the door of the P seat. Hereinafter, similarly, the in-vehicle controller 10 operates the vehicle exterior anchor 11 and the vehicle interior anchor 12 in this order. That is, the in-vehicle controller 10 optimizes the operation order of the vehicle exterior anchors 11 to 14 using the vehicle exterior smart communication.
そして、車載コントローラ１０は、車室外アンカー１１〜１４のいずれかで携帯機２と室外測距通信が完了した場合には、次の室外測距開始条件が成立するまで室外測距通信を停止するとともに、その室外測距通信が完了した車室外アンカー（１１〜１４のいずれか）に応じて、車室内アンカー１５、１６の動作順を決定する。 Then, when the outdoor ranging communication with the portable device 2 is completed at any of the outdoor anchors 11 to 14, the in-vehicle controller 10 stops the outdoor ranging communication until the next outdoor ranging start condition is satisfied. At the same time, the operation order of the vehicle interior anchors 15 and 16 is determined according to the vehicle exterior anchor (any one of 11 to 14) for which the outdoor distance measurement communication has been completed.
図２に示すように、車載コントローラ１０が有する不揮発性のメモリ１７には、それぞれの車室外アンカー１１〜１４に車室内アンカー１５、１６の動作順が紐付けされた動作順データが記憶されている。１〜２段目を参照して、車室外アンカー１１又は車室外アンカー１２で携帯機２と室外測距通信が完了した場合には、室内測距通信において、車室内アンカー１５、車室内アンカー１６の順に動作されることが把握される。一方、３〜４段目を参照して、車室外アンカー１３又は車室外アンカー１４で携帯機２と室外測距通信が完了した場合には、室内測距通信において、車室内アンカー１６、車室内アンカー１５の順に動作されることが把握される。つまり、車載コントローラ１０は、携帯機２との間で室外測距通信が確立した車室外アンカー（１１〜１４のいずれか）から近い順に車室内アンカー（１５、１６）を選択しつつ、車室内アンカー１５、１６の動作順を最適化していることになる。 As shown in FIG. 2, the non-volatile memory 17 of the in-vehicle controller 10 stores operation order data in which the operation orders of the vehicle interior anchors 15 and 16 are linked to the vehicle interior anchors 11 to 14, respectively. Yes. With reference to the first and second stages, when the outdoor ranging communication with the portable device 2 is completed by the outdoor anchor 11 or the outdoor anchor 12, the indoor anchor 15 and the indoor anchor 16 are used in the indoor ranging communication. It is understood that the operations are performed in this order. On the other hand, with reference to the third to fourth stages, when the outdoor ranging communication with the portable device 2 is completed by the vehicle exterior anchor 13 or the vehicle exterior anchor 14, the vehicle interior anchor 16, the vehicle interior It is understood that the anchors 15 are operated in the order. That is, the in-vehicle controller 10 selects the vehicle interior anchors (15, 16) in order from the vehicle exterior anchor (any one of 11 to 14) that has established the outdoor distance measurement communication with the portable device 2, while The operation order of the anchors 15 and 16 is optimized.
そして、車載コントローラ１０は、室内測距開始条件の成立を契機に室内測距通信を開始する。室内測距開始条件成立の一例は、ユーザーによるエンジン始動スイッチの操作時である。車載コントローラ１０は、室内測距開始条件が成立すると、携帯機２との間で室外測距通信が確立した車室外アンカー（１１〜１４のいずれか）に紐付けされた動作順にしたがって車室内アンカー１５、１６を動作させる。例えば、車室外アンカー１１で携帯機２と室外測距通信が完了した場合には、動作順データにしたがって最初に車室内アンカー１５を選択し、この車室内アンカー１５で携帯機２と室内測距通信が完了した場合には、次の室内測距開始条件が成立するまで室内測距通信を停止する。一方、車室内アンカー１５から測距信号を送信したにもかかわらず室内測距通信が確立しなかった場合には、動作順データにしたがって今度は車室内アンカー１６を選択し、この車室内アンカー１６で携帯機２との室内測距通信を試みる。 And the vehicle-mounted controller 10 starts indoor ranging communication in response to establishment of indoor ranging start conditions. One example of satisfying the indoor ranging start condition is when the user operates the engine start switch. When the indoor ranging start condition is satisfied, the in-vehicle controller 10 follows the in-vehicle anchor according to the operation sequence linked to the outdoor anchor (any one of 11 to 14) with which the outdoor ranging communication is established with the portable device 2. 15 and 16 are operated. For example, when outdoor ranging communication with the portable device 2 is completed by the vehicle interior anchor 11, the vehicle interior anchor 15 is first selected according to the operation order data, and the portable device 2 and the indoor distance measuring device are selected by the vehicle interior anchor 15. When the communication is completed, the indoor ranging communication is stopped until the next indoor ranging start condition is satisfied. On the other hand, when the distance measurement signal is transmitted from the vehicle interior anchor 15 and the indoor distance measurement communication is not established, the vehicle interior anchor 16 is selected in accordance with the operation order data. Then, indoor ranging communication with the portable device 2 is attempted.
ところで、図１を参照して、車両キーとしてユーザーに所持される携帯機２は、自キーを統括的に制御するキー制御部２０の他、ＵＷＢ帯の測距信号を送受信するＵＷＢ通信部２１を備えている。キー制御部２０は、ＵＷＢ通信部２１によって測距信号を受信すると、その測距信号をＵＷＢ通信部２１によって車両１に送り返す。この測距信号が車両アンカー（車室外アンカー１１〜１４或いは車室内アンカー１５、１６）によって受信されると、車載コントローラ１０は、その車両アンカーを通じて測距信号を送信してから当該車両アンカーによって測距信号を受信するまでの時間を基に、車両アンカー（通信機）と携帯機２（通信機の通信対象）との距離を測定する。そして、車載コントローラ１０は、例えば周知のＩＤ照合が成立し、且つ、測定した距離が閾値以下であることを条件に、エンジンを始動する。車載コントローラ１０を有する車両１と携帯機２とにより電子キーシステム３が構築され、この電子キーシステム３が距離測定システムの一例である。 By the way, with reference to FIG. 1, the portable device 2 possessed by the user as a vehicle key has a UWB communication unit 21 that transmits and receives a ranging signal in the UWB band, in addition to a key control unit 20 that comprehensively controls its own key. It has. When the key control unit 20 receives the ranging signal by the UWB communication unit 21, the key control unit 20 sends the ranging signal back to the vehicle 1 by the UWB communication unit 21. When this distance measurement signal is received by the vehicle anchor (the vehicle exterior anchors 11 to 14 or the vehicle interior anchors 15 and 16), the in-vehicle controller 10 transmits the distance measurement signal through the vehicle anchor and then measures the vehicle anchor. Based on the time until the distance signal is received, the distance between the vehicle anchor (communication device) and the portable device 2 (communication target of the communication device) is measured. And the vehicle-mounted controller 10 starts an engine on condition that the well-known ID collation is materialized and the measured distance is below a threshold value, for example. An electronic key system 3 is constructed by the vehicle 1 having the in-vehicle controller 10 and the portable device 2, and this electronic key system 3 is an example of a distance measuring system.
次に、距離測定システムの作用について説明する。
図３に示すように、携帯機２を所持したユーザーが例えばＰ席のドアの周辺に形成された車室外通信エリア内に進入した場合を想定する。この場合、その車室外通信エリアで車室外スマート通信が成立するため、車室外アンカー１１〜１４のうち、Ｐ席のドアから最も近い車室外アンカー１３が最初に選択され、この車室外アンカー１３で携帯機２と室外測距通信が完了することになる。そして、この場合、室内測距通信において、車室内アンカー１６、車室内アンカー１５の順に動作され、最初の車室内アンカー１６で携帯機２と室内測距通信が完了することになる。このように室外測距通信の他、室内測距通信でも車両アンカーの動作順が最適化されることに伴い、それぞれの測距通信の回数が１回ずつ合計でも２回と最小で済む確率が上がることになる。
Next, the operation of the distance measurement system will be described.
As shown in FIG. 3, it is assumed that the user who has the portable device 2 enters a communication area outside the vehicle compartment formed around the door of the P seat, for example. In this case, since the smart communication outside the vehicle is established in the communication area outside the vehicle interior, the vehicle exterior anchor 13 closest to the door of the P seat among the vehicle exterior anchors 11 to 14 is first selected. The outdoor ranging communication with the portable device 2 is completed. In this case, in the indoor ranging communication, the vehicle interior anchor 16 and the vehicle interior anchor 15 are operated in this order, and the first indoor interior anchor 16 completes the indoor ranging communication with the portable device 2. Thus, in addition to the outdoor ranging communication, the indoor anchoring operation order is optimized in the indoor ranging communication, and therefore, the probability that the number of each ranging communication can be minimized to one or two at a time. Will go up.
尚、車室外アンカー１３又は１４で携帯機２と室外測距通信が成立した場合には、ユーザーが車両左側（Ｐ席又は左リア席）に移動する確率が高く、車室外アンカー１１又は１２で携帯機２と室外測距通信が成立した場合には、ユーザーが車両右側（Ｄ席又は右リア席）に移動する確率が高いと考えられる。こうした考えのもと、本例の距離測定システムでは、それぞれの車室外アンカー１１〜１４に車室内アンカー１５、１６の動作順が紐付けされた動作順データを用いることとし、これにより、車室内アンカー１５、１６の動作順が最適化される。 When outdoor ranging communication with the portable device 2 is established by the vehicle exterior anchor 13 or 14, the user has a high probability of moving to the left side of the vehicle (P seat or left rear seat), and the vehicle exterior anchor 11 or 12 When outdoor ranging communication is established with the portable device 2, it is considered that the probability that the user moves to the right side of the vehicle (D seat or right rear seat) is high. Based on this idea, in the distance measurement system of this example, the operation order data in which the operation orders of the vehicle interior anchors 15 and 16 are linked to the respective vehicle exterior anchors 11 to 14 is used. The order of movement of the anchors 15, 16 is optimized.
ちなみに、本例とは異なり、固定的な順番で例えば車室内アンカー１５、車室内アンカー１６の順に動作される比較例では、車室外左前の車室外アンカー１３で携帯機２と室外測距通信が成立した場合でも、車室内アンカー１５、車室内アンカー１６の順に動作される。この場合において、ユーザーが車室内左前のＰ席に移動したとき、最初の車室内アンカー１５では携帯機２と室内測距通信が成立せず、車室内アンカー１６での室内測距通信が必要となる。つまり、室内測距通信だけで通信回数が２回となり、本例の１回よりも通信回数が多い分、車両１及び携帯機２の双方において、多くの消費電流が必要になる。例えば、第１のユーザーが携帯機２を所持して先にＰ席に乗り込むとともに、第２のユーザーが携帯機２を所持せず後からＤ席に乗り込んで運転をする場合に、上記比較例に比べ本例は好適となることが分かる。 Incidentally, unlike the present example, in the comparative example in which the vehicle interior anchor 15 and the vehicle interior anchor 16 are operated in a fixed order, for example, the portable device 2 and the outdoor distance measurement communication are performed by the vehicle exterior anchor 13 on the left front outside the vehicle interior. Even if it is established, the vehicle interior anchor 15 and the vehicle interior anchor 16 are operated in this order. In this case, when the user moves to the left P seat in the vehicle interior, the first vehicle interior anchor 15 does not establish indoor distance measurement communication with the portable device 2, and the vehicle interior anchor 16 requires indoor distance measurement communication. Become. That is, the number of times of communication is only two times in indoor ranging communication, and a larger amount of current is required in both the vehicle 1 and the portable device 2 because the number of times of communication is larger than the one in this example. For example, when the first user has the portable device 2 and gets into the P seat first, and the second user does not have the portable device 2 and later gets into the D seat and drives, the above comparative example It can be seen that this example is more suitable than
以上説明したように、本実施の形態によれば、以下の効果を奏することができる。
（１）車載コントローラ１０は、携帯機２との間で室外測距通信が確立した車室外アンカー（１１〜１４のいずれか）に応じて、車室内アンカー１５、１６の動作順を決定する。これにより、車室内アンカー１５、１６の動作順が最適化される。したがって、室内測距通信の通信性能を向上できる。
As described above, according to the present embodiment, the following effects can be obtained.
(1) The vehicle-mounted controller 10 determines the operation order of the vehicle interior anchors 15 and 16 according to the vehicle exterior anchor (any one of 11-14) with which outdoor ranging communication was established with the portable device 2. Thereby, the operation | movement order of the vehicle interior anchors 15 and 16 is optimized. Therefore, the communication performance of indoor ranging communication can be improved.
（２）車載コントローラ１０は、携帯機２との間で室外測距通信が確立した車室外アンカー（１１〜１４のいずれか）に紐付けされた動作順にしたがって車室内アンカー１５、１６を動作させる。したがって、動作順データを参照しつつ適切に車室内アンカー１５、１６を選択することができる。 (2) The vehicle-mounted controller 10 operates the vehicle interior anchors 15 and 16 according to the operation sequence linked to the vehicle exterior anchor (any one of 11 to 14) with which outdoor ranging communication has been established with the portable device 2. . Therefore, the vehicle interior anchors 15 and 16 can be appropriately selected while referring to the operation order data.
（３）車載コントローラ１０は、携帯機２との間で室外測距通信が確立した車室外アンカー（１１〜１４のいずれか）から近い順に車室内アンカー１５、１６を動作させる。つまり、室内測距通信が確立しやすい順に車室内アンカー１５、１６が選択される。これにより、早期に通信成立する確率を上げることができる。 (3) The vehicle-mounted controller 10 operates the vehicle interior anchors 15 and 16 in order from the vehicle exterior anchor (any one of 11 to 14) established with the outdoor distance measurement communication with the portable device 2. That is, the vehicle interior anchors 15 and 16 are selected in the order in which the indoor ranging communication is easily established. As a result, the probability of establishing communication early can be increased.
（４）車載コントローラ１０は、車室外アンカー１１〜１４のいずれかで携帯機２と室外測距通信が完了した場合には、次の室外測距開始条件が成立するまで室外測距通信を停止するとともに、その室外測距通信が完了した車室外アンカー（１１〜１４のいずれか）に応じて、車室内アンカー１５、１６の動作順を決定する。したがって、室外測距通信にかかる消費電流を少なくできる他、早い段階で車室内アンカー１５、１６の動作順を決定することができる。 (4) When the outdoor ranging communication with the portable device 2 is completed at any one of the outdoor anchors 11 to 14, the in-vehicle controller 10 stops the outdoor ranging communication until the next outdoor ranging start condition is satisfied. In addition, the operation order of the vehicle interior anchors 15 and 16 is determined according to the vehicle exterior anchor (any one of 11 to 14) for which the outdoor distance measurement communication has been completed. Therefore, in addition to reducing current consumption for outdoor ranging communication, the operation order of the vehicle interior anchors 15 and 16 can be determined at an early stage.
（５）車載コントローラ１０は、車室内アンカー１５、１６のいずれかで携帯機２と室内測距通信が確立した場合には、次の室内測距開始条件が成立するまで室内測距通信を停止する。したがって、室内測距通信にかかる消費電流を少なくできる。 (5) In-vehicle controller 10 stops indoor ranging communication until the next indoor ranging start condition is satisfied when indoor ranging communication is established with portable device 2 at either of vehicle interior anchors 15 and 16. To do. Therefore, current consumption for indoor ranging communication can be reduced.
尚、上記実施の形態は、次のように変更して具体化することも可能である。
・車両１に代えて建物に設けられる通信機とその通信機の通信対象との間で測距信号を相互に送受信する測距通信を行い、その測距信号を解析することにより通信機と通信対象との距離を測定する距離測定システムに本発明を適用してもよい。
It should be noted that the above embodiment can be modified and embodied as follows.
・ Communication with the communication device is performed by performing distance measurement communication between the communication device provided in the building instead of the vehicle 1 and the communication object of the communication device, and transmitting and receiving distance measurement signals to each other and analyzing the distance measurement signal. You may apply this invention to the distance measurement system which measures the distance with object.
・室外スマート通信が成立した室外通信エリアに応じて、室内通信機の動作順を決定してもよい。
・開けられたドアに応じて、室内通信機の動作順を決定してもよい。
-The operation order of the indoor communication devices may be determined according to the outdoor communication area where the outdoor smart communication is established.
-You may determine the order of operation | movement of an indoor communication apparatus according to the opened door.
・ＵＷＢ帯とは異なる別の周波数帯の電波を測距信号として用いてもよい。 -A radio wave in a different frequency band from the UWB band may be used as the ranging signal.
１…車両、２…携帯機（通信対象）、３…電子キーシステム（距離測定システム）、１０…車載コントローラ（通信制御部）、１１〜１４…車室外アンカー（室外通信機）、１５，１６…車室内アンカー（室内通信機）、１７…メモリ、２０…キー制御部、２１…ＵＷＢ通信部。 DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Portable machine (communication object), 3 ... Electronic key system (distance measurement system), 10 ... In-vehicle controller (communication control part), 11-14 ... Anchor outside a vehicle (outdoor communication machine), 15, 16 ... Vehicle interior anchor (indoor communication device), 17 ... Memory, 20 ... Key control unit, 21 ... UWB communication unit
Claims (5)
前記通信機として、室外測距開始条件の成立を契機に室外測距通信を行う室外通信機と、室内測距開始条件の成立を契機に室内測距通信を行う室内通信機とを備え、
通信対象との間で室外測距通信が確立した室外通信機に応じて、室内通信機の動作順を決定する通信制御部を備える
距離測定システム。 When the distance measurement start condition is satisfied, the distance measurement signal is transmitted and received between the communication device and the communication target of the communication device, and the distance measurement signal is analyzed to communicate with the communication device. In the distance measurement system that measures the distance to the object,
As the communication device, an outdoor communication device that performs outdoor ranging communication when the outdoor ranging start condition is established, and an indoor communication device that performs indoor ranging communication when the indoor ranging start condition is established,
A distance measurement system comprising a communication control unit that determines an operation order of indoor communication devices according to an outdoor communication device that has established outdoor ranging communication with a communication target.
前記通信制御部は、通信対象との間で室外測距通信が確立した室外通信機に紐付けされた動作順にしたがって室内通信機を動作させる
請求項１に記載の距離測定システム。 A memory for storing operation order data in which the operation order of the indoor communication device is linked to the outdoor communication device,
The distance measurement system according to claim 1, wherein the communication control unit operates the indoor communication device according to an operation sequence associated with an outdoor communication device that has established outdoor ranging communication with a communication target.
請求項１又は２に記載の距離測定システム。 The distance measurement system according to claim 1, wherein the communication control unit operates the indoor communication device in the order from the outdoor communication device in which outdoor ranging communication is established with the communication target.
請求項１〜３のいずれか一項に記載の距離測定システム。 When the communication target and the outdoor ranging communication are completed in any of the outdoor communication devices, the communication control unit stops the outdoor ranging communication until the next outdoor ranging start condition is satisfied, and The distance measurement system according to any one of claims 1 to 3, wherein an operation order of the indoor communication devices is determined according to the outdoor communication device for which the distance communication has been completed.
請求項１〜４のいずれか一項に記載の距離測定システム。 The communication control unit stops the indoor ranging communication until the next indoor ranging start condition is satisfied when the indoor ranging communication is established with the communication target in any indoor communication device. The distance measuring system according to any one of the above.
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| JP2007070953A (en) * | 2005-09-09 | 2007-03-22 | Alps Electric Co Ltd | Keyless entry device |
| JP2011127368A (en) * | 2009-12-18 | 2011-06-30 | Tokai Rika Co Ltd | Communication area forming device of electronic key system |
| JP2014227647A (en) * | 2013-05-17 | 2014-12-08 | 株式会社東海理化電機製作所 | Electronic key system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021148741A (en) * | 2020-03-23 | 2021-09-27 | 株式会社東海理化電機製作所 | Control device, control system, and program |
| WO2021192422A1 (en) * | 2020-03-23 | 2021-09-30 | 株式会社東海理化電機製作所 | Control device, control system, and program |
| JP7366816B2 (en) | 2020-03-23 | 2023-10-23 | 株式会社東海理化電機製作所 | Control device, control system, and program |
| US11772604B2 (en) | 2020-11-24 | 2023-10-03 | Aisin Corporation | Position estimation method for mobile terminal, position estimation device for mobile terminal and position estimation system for mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112019002623T5 (en) | 2021-03-18 |
| WO2019225430A1 (en) | 2019-11-28 |
| DE112019002623T8 (en) | 2021-05-20 |
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